Adjustable head for a formwork prop

ABSTRACT

AN ADJUSTABLE HEAD FOR A FORMWORK PROP FOR USE IN THE CASTING OF CONCRETE SLABS COMPRISES A BODY IN SCREWTHREADED ENGAGEMENT WITH A MEMBER FOR ROTATABLE ENGAGEMENT WITH THE UPPER END OF THE PROP. THE BODY INCLUDES A CHANNEL ONE SIDE OF WHICH CAN BE PIVOTED TO A   POSITION CLEAR OF THE WEB OF THE CHANNEL TO PERMIT REMOVAL OF A BEAM SUPPORTED THEREBY.

Sept. 20, 1971 I YOUNG 3,606,232

ADJUSTABLE HEAD FOR A FORMWORK PROP Filed 001.- 31, 1968 r x 2 O OZIIIIE?T E V; ZF ZZZ"II 25 D i.

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ATTORNEYS United States Patent US. Cl. 248-357 1 Claim ABSTRACT OF THEDISCLOSURE An adjustable head for a formwork prop for use in the castingof concrete slabs comprises a body in screwthreaded engagement with amember for rotatable engagement with the upper end of the prop. The bodyincludes a channel one side of which can be pivoted to a position clearof the web of the channel to permit removal of a beam supported thereby.

This invention relates to an adjustable head for a formwork prop for usein the casting of concrete slabs.

A head in accordance with the invention comprises a body inscrew-threaded engagement with a member adapted for rotatable engagementwith the upper end of the prop, said body including a portion of channelshaped configuration to receive and support a beam, and one side of saidchannel being mounted for pivotal displacement to a position such thatthe beam can be removed by lateral displacement thereof relative to thebody.

An example of the invention is shown in the accompanying drawing inwhich FIGS 1 and 2 are mutually perpendicular elevations of the head.

The head comprises a body consisting of a length of tube 11 secured to abent metal plate 12. The end of the tube remote from the plate 12 isreduced and internally threaded. The plate 12 has a web portion 13, anupstanding flange 14 at one edge of the web portion 13 and a narrowerdepending flange 15 at the other edge of the web portion 13.

A further plate 16 is attached to the flange 15 of the plate 12 and iscooperable with the flange 14 to provide a channel for receiving awooden beam. The plate 16 is formed at one end with a notch 17 and withan elongated slot 18 aligned with the notch 17. A rivet 19 on the flange15 extends through the slot 18 so as to pivotally and slidably retainthe plate 16 on the flange 15. An eye bolt 20 engaged with a nut 21secured to one end of the flange 15 is engageable in the notch 17Screw-threadedly engaged with the internal screw threads at the end ofthe tube 11 is an externally threaded tube 22 to which a lug 23 issecured.

The head described is used in conjunction with modular scaffolding inwhich the uprights of the scaffolding are provided at their upper endswith pins such as those described in our British Pat. No. 1,006,952 andour application No. 49,007 65. For example, the upper end of the3,606,232 Patented Sept. 20, 1971 prop 25 is provided with a pin 26which is rotatably engaged by the tube or support member 22. Theuprights of the scaifolding therefore act as props to support beamsreceived by the channels presented by the bodies 11 of the heads on therespective uprights. The beams, in turn, support the formwork forcasting a slab. When the slab has set and it is desired to remove theformwork, the head is lowered by turning of the externally threaded tube22 by engaging a suitable tool in an aperture in the lug 23. Any screwswhich have been used to secure the plates 12, 16 to the beam areremoved, and the eye bolt 20 is then slackened so that the plate 16 canbe displaced to the right as viewed in FIG. 2 and turned in a clockwisedirection. The beam can then be disengaged from the body 10 by lateralmovement of the beam.

The provision of the slot 18 for the pivotal and sliding connection ofthe plate 16 to the flange 15 enables the plate 16 to be displaced toits out-ofservice position without causing the upper part of the plate16 to rise to an excessively high level. Thus interference with theformwork during the striking of the beams is avoided.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1, A head for a formwork prop comprising a support member adapted forrotatable engagement with a vertical pin on the upper end of the prop, abody in screwthreaded engagement with said support member for verticaladjustment of the body by rotation of the support member relative to thebody, said body including a web portion, a fixed upstanding flange atone edge of the web portion and a side part mounted on said -web portionfor pivotal displacement between an upstanding operative position inwhich the web portion, the fixed flange and the side part form incombination a channel to receive and support a beam, and an inoperativeposition in which a beam supported by the head can be removed by lateraldisplacement of the beam relative to the body further comprising adepending flange on said web portion, a projection on said dependingflange, and a bolt threadedly engaged with said depending flange at aposition spaced from said projection and in which said side part isformed with a slot extending lengthwise of the plate and slidablyreceiving said projection and with a notch, with which said slot isaligned engageable with said bolt for locking the side part in itsupstanding operative position.

References Cited UNITED STATES PATENTS 737,133 8/1903 OBrien 2483571,556,118 10/1925 Lee 248357X 1,757,321 5/1930 MacDonald 248235X2,897,013 7/1959 Delp 248235X ROY D. FRAZIER, Primary Examiner F.DOMOTOR, Assistant Examiner US. Cl. X.R.

